Zeiss Ikon Viewfinder ZI for the 25mm & 28mm Lenses. Unlike 35 mm SLR camera viewfinders, that can only show little more than 90% of what will be recorded on film, the Zeiss Ikon viewfinder lets you see the area that surrounds the actual image giving you greater possibilities and confidence as you compose each image. What's more, the triangulation rangefinder combined with a viewfinder base that is the widest available means that you can expect extreme accuracy and wide-angle focusing precision. All of this and more so that you can follow your passion: creating great images. Vendor Part # 1365664